Morning glory pollen grains. Coloured scanning electron micrograph (SEM) of pollen grains from a morning glory flower (Ipomoea sp.). The grains have a highly sculptured outer wall (exine),which assists its dispersal by improving its adherence to pollinating insects. The characteristic surface of a pollen grain is used by botanists to recognise and classify plants. Each pollen grain contains a male gamete (reproductive cell) that is intended to fertilise an egg or ovule (female gamete),and initiate the formation of a seed for a new plant | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Nishinaga, Susumu |
Bildgröße: | 3084 px × 4022 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |